Grinder for web-slitting apparatus



April 5, 1932. c. KOEGEL ET AL 1,852,313

GRINDER FOR WEB SLITTING APPARATUS Filed April 5. 1930 IN VEN TOR.

C9lorees Koegel and ATTORNEY.

y Frederick W. Koegel Patented Apr. 5, 1932 UNITED STATES PATENT OFFICE GRINDER FOR WEB-SLITTING APPARATUS Application filedApril s, 1930. Serial No. 441,274.

L thereof.

It is ordinary practice in connection with the making of webs, such as fabric of all kinds, paper and the like, to slit the webs as they are fed through a machine on which the webs are formed or treated. To accomplish this a drive shaft extends across the machine at one side of the web which carries one or more rotary knives which may be called slitting discs while other knives or discs engage and co-operate with said knives or discs for a slitting operation. v arious numbers of knives or discs may be employed to slit the web into as many separate webs as may be desired, while at the same time the said discs are adjustable transversely of the shaft which carries them to provide webs of various widths.

ft is frequently necessary to recondition the slitting knives or discs by sharpening their cutting edges. To accomplish this according to the present method the shaft referred to is removed from the machine and the lflliVQS are removed from the shaft so that they may be placed in a machine for grinding the cutting edges thereof. Not only does this entail labor and interfere with the operation of the machine with which the discs are used, but when the slitting discs are assembled on the shaft and the shaft relocated in the n achine the cutting edges do not run true. Ti is because of relative shifting of the parts, that shifting of the discs on the shaft and the shifting of the shaft in its bearing and associated parts.

According to this invention, we provide means associated with web slitting appa ratus whereby the discs may be sharpened without removing the shaft from the ma chine or removing the discs from the shaft. The apparatus is adapted to operate on the di :s while they are rotated by the shaft in the normal manner. In this way the discs may be sharpened so that the cutting edges thereof run true with respect to their axis of rotation and not only are they therefore conditioned for efficient operation but the operation of the paper-making machine is not interfered with to an extent which is objectionable.

It will be understood that any reference to paper-making machines is for purposes of disclosure rather than limitation and that the term disc may mean any form of cutters, knives or slitters which are carried and rotated by the shaft.

The novel features and advantages of the i vent-ion will be observed from the following description thereof taken in connection with the accompanying drawings, in which Fig. 1 is an elevational View of an apparatus embodying the features of the invention,

Fig. 2 is a sectional elevational View taken in the line 2-2 of Fig. 1.

Referring to the drawings in detail, the invention will now be described in detail.

At 2 there is represented a pair of side frames or supports of a paper making machine which have upper and lower bearings 1 1 and ti. 1 shaft 8 is fixed against rotation in the upper bearings 14 to serve as a support for a grinder and upper cutter, while a lower shaft 10 is rotatable in the bearings 5. This lower shaft is rotated as by a belt engaging a pulley 12 thereof and has slidably adjustable thereon a plurality of lower slitting discs such as is indicated by 13.

The members 2 are located so that the shaft 10 extends across and beneath the web of paper on a paperanalring machine and as many of the discs 13 are carried by the shaft as may be desired. Other cutting discs are supported by shanks adjustable in brackets such as 16 which are slidably adjustable on the shaft 8 so that the cutting edges thereof may engage and co-operate with cutting edges 15 of the discs 13 for slitting a web as it travels over the cutting discs transversely to the axis of shaft 10. These upper cutters (not shown) are removable from the brackets such as 16.

It is desired to sharpen the cutting edges 15 of the discs 13 without removing the shaft 10 from the machine and without removing the discs 13 from the shaft. This is accomper end of the shankispreferably screwthreaded to receive a nut 26 so that as the screw 24: is loosened the shank will not slip downwardly.

A plate 28 has an upwardly extending lug 30 and a clamp bolt 32; passing through said lug is screw threaded in the lower end of the shank 22. By loosening the bolt the plate may be tilted to various angular positions wherein it' may be clamped by tightening the bolt;

A'motor 36 is slidable in a guideway 38 provided in the plate 28 so as to be movable with respect thereto and a feed screw i0 rotatable in a platet2 fixed to plate 28 is in threaded engagement with the motor for movingthe motor back and forth along the plate 28.

A'tool Tsuch as an abrasive wheel or the like is carried by a shaft l i of the motor 36 for contacting with the cutting edge 15 of the disc 14.

hen it desired to sharpen the cutting edge of the disc 1a the shank is inserted in bracket 16 and the parts are adjusted so that the wheel contacts with the disc. By rotating the shaft 10 the cutting edge of the disc is rotated so that it is brought into contact with the abrasive wheel which is rotated by the motor.

It will be noted that the parts may be raised or lowered to locate the tool at a desired level with respect to the axis of shaft 10. The plate-may be tilted to locate-theabrasivewheel angularly with respect to the cutting edge of the disc, while the motor may be fed forward and back to obtain the required depth of cut of the tool.

Having described the invention, what we desire to claim and secureby Letters Patent of the United States is:

1. The combination of a rotatable shaft having a sharpened slitting disk thereonwith means for sharpening said disk comprising, a support parallel to said shaft, a bracket sl-idably, adjustable on said support, a shank slidable in said bracket on an axis opposed to the axisof said shaft, a plate pivotally adjustable at an end of said shank near-est said shaft having a guideway disposed in a plane opposed to the axis of said shaft and said shank, a motor 'guideablein said 'guideway having a shaft disposed on an axis opposed to that of said shank, mechanism associated with said motor and plate for moving the former relative to the latter and a grinder carried by said motor shaft for operating on said slitting disk on said first-named shaft.

2. An apparatus for sharpening slitting disks comprising in combination, a rotatable shaft for aslitting-disk, a stationary support member thereabout, a member slidably and oscillatably adjustable on said support member, a'sha'nk adjustable in sai-d memher, a plate pivoted on the lower end of said shank, a grinding mechanism adjustable in said plate including a motor having a shaft for carrying a grinding element for. operating on a slitting disk on said rotatable shaft.

An apparatus for sharpening slitting discs comprisingin combination, arotatable shaft for a. slitting disc, a support parallel thereto, a member adjustable thereon, ashank adjustable in said member, a plate pivoted on said shank for swinging movementsanda motor slidable on said plate having a-tool for acting on a disc on said shaft I 4. An apparatus for sharpeningsli ttingr discs comprising in combination, a rotatable shaft for a slitting disc," a non-rotatable shaft in spaced parallel relation with respect thereto, a sleeve adjustable therealong, a shank slidable in a boss on said sleeve, aplat-e pivoted on the lower end of said shank for swinging movements into various positions, a motor having a part slidable in a groove provided in said plate and includinga shaft-for carrying a grinder and means associated with said motor and plate to effect relative movements thereof.

CHARLES KOEGEL, FREDERICK 1V. KOEGE-Ll- 

